Submission #1033235

#	Time	Username	Problem	Language	Result	Execution time	Memory
1033235		juicy	Self Study (JOI22_ho_t2)	C++17	100 / 100	134 ms	9068 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif

int main() {
	ios::sync_with_stdio(false); cin.tie(nullptr);

	int N, M; cin >> N >> M;
	vector<int> A(N), B(N);
	for (int i = 0; i < N; ++i) {
		cin >> A[i];
	}
	for (int i = 0; i < N; ++i) {
		cin >> B[i];
	}
	auto check = [&](long long K) -> bool {
		long long cnt = 0;
		for (int i = 0; i < N; ++i) {
			auto X = K;
			if (A[i] > B[i]) {
				int dec = min((long long) M, (X - 1) / A[i] + 1);
				X -= (long long) dec * A[i];
				cnt += dec;
			}
			if (X > 0) {
				cnt += (X - 1) / B[i] + 1;
			}
			if (cnt > (long long) N * M) {
				return 0;
			}
		}
		return 1;
	};
	long long L = 1, R = 1e18, res = 0;
	while (L <= R) {
		auto md = (L + R) / 2;
		if (check(md)) {
			res = md;
			L = md + 1;
		} else {
			R = md - 1;
		}
	}
	cout << res;
	return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 29 / 29
• Subtask 5: 9 / 9